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ASTM E140, Upgrade 12B, – Basic Stiffness Conversion process Tables to have Metals Relationship Certainly Brinell Stiffness, Vickers Hardness, Rockwell Hardness, Shallow Hardness, Knoop Firmness, Scleroscope Stiffness, and Leeb Hardness
Conversion process Table step one gifts investigation from the Rockwell C firmness diversity for the dating certainly Brinell hardness, Vickers hardness, Rockwell firmness, Rockwell superficial stiffness, Knoop hardness, and you will Scleroscope hardness regarding low-austenitic steels in addition to carbon dioxide, alloy, and you will equipment steels in the as-forged, annealed, stabilized, and you will quenched and tempered conditions provided that he’s homogeneous.
Conversion process Dining table dos merchandise studies on the Rockwell B firmness variety to the matchmaking among Brinell hardness, Vickers firmness, Rockwell firmness, Rockwell shallow stiffness, Knoop stiffness, and you will Scleroscope hardness out of non-austenitic steels along with carbon, metal, and you may device steels regarding since-forged, annealed, normalized, and you may quenched and you will tempered criteria so long as he’s homogeneous.
Transformation Desk 3 merchandise studies to the relationship certainly Brinell stiffness, Vickers stiffness, Rockwell hardness, Rockwell shallow hardness, and you will Knoop hardness away from nickel and you outpersonals sign up may large-nickel metals (nickel blogs more fifty %).
Conversion process Desk 4 merchandise study into the dating certainly one of Brinell stiffness, Vickers stiffness, Rockwell stiffness, and you will Rockwell superficial stiffness away from cartridge steel.
Conversion process Table 7 gift ideas data toward relationship among Brinell firmness, Vickers stiffness, Rockwell hardness, Rockwell low firmness, and you may Knoop stiffness regarding copper.
Conversion process Table 8 gifts study toward dating among Brinell hardness, Rockwell firmness, and Vickers hardness regarding alloyed light metal.
Sales Dining table 9 merchandise research towards dating certainly one of Brinell hardness, Vickers firmness, Rockwell hardness, and you can Rockwell low hardness from wrought aluminium affairs.
Sales Dining table 10 presents study about Rockwell C hardness variety towards relationship among Leeb (Method of D) firmness, Brinell stiffness, Vickers hardness, and Rockwell stiffness of low-austenitic steels along with carbon dioxide, metal, and you may equipment steels throughout the since the-forged, annealed, normalized, and you may quenched and you will tempered requirements provided he could be homogeneous.
Many of the conversion opinions demonstrated here have been taken from pc-made contours of actual attempt analysis. Really Rockwell hardness wide variety try presented to the fresh new nearest 0.1 or 0.5 firmness amount to allow real reproduction of those curves.
Annex A1 – Annex A10 include equations to alter from hardness size to help you other. The equations given in the Annex A1 – Annex A9 were put up on study for the Tables step 1 to help you 9, respectively. The new equations given during the Annex A10 was indeed created during the time the latest Leeb firmness shot try designed (get a hold of Appendix X2). The info inside the Desk 10 is computed on the Annex A10 equations.
Sales off hardness values will likely be used only when it’s impossible to test the information presented underneath the requirements specified, incase conversion process is done it ought to be completed with discernment and you may significantly less than managed criteria. Every type from stiffness sample try at the mercy of certain problems, but if precautions is actually meticulously observed, brand new accuracy off hardness indication produced into the tools of one’s indentation style of is found similar. Differences in sensitiveness for the set of a given hardness level (eg, Rockwell B) is generally higher than ranging from several various other balances otherwise brand of instruments. The sales philosophy, if or not regarding tables otherwise determined throughout the equations, are just estimate and could become inaccurate getting particular software.
This around the world simple was developed in accordance with international acknowledged values into the standardization established in the ent from International Requirements, Courses and Advice approved from the Community Trade Organization Technical Barriers so you’re able to Change (TBT) Panel.